make DocumentNotFound simpler to initialize
make DocumentNotFound simpler to initialize

[fixes #3198]

eljojo/mongoid,mongoid/mongoid,Zhomart/mongoid,kay-kim/mongoid,drobune/mongoid,amw/mongoid,kay-kim/mongoid,kentaroi/mongoid,cmpolis/mongoid,hashrocketeer/mongoid,mongoid/mongoid,mongodb/mongoid,herimedia/mongoid,rafaelgaspar/mongoid,camallen/mongoid,kayakyakr/mongoid,aj0strow/mongoid,joshsoftware/mongoid,drfeelngood/mongoid,etomic/mongoid,hxx/mongoid,kcdragon/mongoid,amw/mongoid,dbkbali/mongoid,Azzurrio/mongoid,elia/mongoid,subhashb/mongoid,nusco/mongoid,itbakery/mongoid,rpocklin/mongoid,Welovroi/mongoid,karmakaze/mongoid,uniiverse/mongoid,karmakaze/mongoid,imomoisoft/mongoid,canvas-drw/mongoid,stnguyen/mongoid,subhashb/mongoid,uniiverse/mongoid,greggroth/mongoid,stnguyen/mongoid,krasnoukhov/mongoid,Subskii/mongoid,camallen/mongoid,krasnoukhov/mongoid,zaithottakath/mongoid,narutosanjiv/mongoid,arnkorty/mongoid,abezzub/mongoid,chetan/mongoid,asantamar/mongoid,sepastian/mongoid,kevinmarvin/mongoid,kuadrosx/mongoid,estolfo/mongoid,herimedia/mongoid,estolfo/mongoid,simi/mongoid,zaithottakath/mongoid,cmpolis/mongoid,abezzub/mongoid,Zhomart/mongoid,aleksclark/mongoid,wuboy0307/mongoid,sivagollapalli/mongoid,mysociety/mongoid,jonhyman/mongoid,matbox/mongoid,Sharevari-Inc/mongoid,joshsoftware/mongoid,dbkbali/mongoid,gullitmiranda/mongoid,glebtv/mongoid,rinmu/mongoid,nviennot/mongoid,bjori/mongoid,hbakhtiyor/mongoid,mgartner/mongoid,fredjean/mongoid,captain-lucas/mongoid,Azzurrio/mongoid,drfeelngood/mongoid,aleksclark/mongoid,grossws/mongoid,greggroth/mongoid,asantamar/mongoid,gregmolnar/mongoid,crowdtap/mongoid,robwil/mongoid,tzar/mongoid,rubrikkfabrikken/mongoid,zenjoy/mongoid,kevinmarvin/mongoid,johnny-miyake/mongoid,parov/mongoid,mysociety/mongoid,codedogfish/mongoid,jasl/mongoid,hbakhtiyor/mongoid,trmmy/mongoid,cao7113/mongoid,bencrouse/mongoid,sideci-sample/sideci-sample-mongoid,infiverve/mongoid,mattconnolly/mongoid,Subskii/mongoid,blackxored/mongoid,gregmolnar/mongoid,demarque/mongoid,nicolasblanco/mongoid,sideci-sample/sideci-sample-mongoid,tricknotes/mongoid,wuboy0307/mongoid,blackxored/mongoid,praecipula/mongoid,captain-lucas/mongoid,johnny-miyake/mongoid,trmmy/mongoid,praecipula/mongoid,aj0strow/mongoid,kentaroi/mongoid,dustinwatson/mongoid,PerfectMemory/mongoid,rafaelgaspar/mongoid,charliehq/mongoid,CIRCUITLLC/mongoid,tzar/mongoid,codedogfish/mongoid,mattconnolly/mongoid,charliehq/mongoid,rpocklin/mongoid,cao7113/mongoid,jonhyman/mongoid,eljojo/mongoid,fredjean/mongoid,crowdtap/mongoid,arnkorty/mongoid,Sharevari-Inc/mongoid,glebtv/mongoid,Numerico/mongoid,mongodb/mongoid,CIRCUITLLC/mongoid,mongodb/mongoid,jtescher/mongoid,hashrocketeer/mongoid,chetan/mongoid,dustinwatson/mongoid,kuadrosx/mongoid,matbox/mongoid,nusco/mongoid,etomic/mongoid,bjori/mongoid,infiverve/mongoid,imomoisoft/mongoid,robwil/mongoid,sepastian/mongoid,SumeruSoftware/mongoid,nviennot/mongoid,kcdragon/mongoid,Numerico/mongoid,rinmu/mongoid,timgluz/mongoid,Welovroi/mongoid,itbakery/mongoid,timgluz/mongoid,kayakyakr/mongoid,bencrouse/mongoid,narutosanjiv/mongoid,jbrien/mongoid,X0nic/mongoid,drobune/mongoid,demarque/mongoid,zenjoy/mongoid,simi/mongoid,rubrikkfabrikken/mongoid,zBMNForks/mongoid,X0nic/mongoid,jbrien/mongoid,parov/mongoid,tricknotes/mongoid,gullitmiranda/mongoid,SumeruSoftware/mongoid,jasl/mongoid,mgartner/mongoid,canvas-drw/mongoid,sivagollapalli/mongoid,zBMNForks/mongoid,PerfectMemory/mongoid,hxx/mongoid,elia/mongoid,grossws/mongoid,jtescher/mongoid